"""
集合的遍历
"""
set2={12,57,34,67,19,123,126}
for a in set2:
    print(a)

# for i, e in enumerate(set2):
#     print(e)

set3=set()


for a in range(3):
    s=input("输入:")
    set3.add(s)

for e in set3:
    print(e)

